... surface, will not damage the precision machined surface and size; 5, processing, surface smooth, with a ... stress, to increase the fatigue strength, and to reduce friction and wear; 2, sand-blasting, paint, ... to machining of the marks; 3, anodizing and plating before the treatment, in addition to ... dross; 7, with a reflective road marking; 8, arts and crafts decorative appearance; GB 60 # 8 # 200-400 ...